High-active ZnIn2S4/TiO2 Z system catalyst material and preparation method thereof

A technology of znin2s4 and catalyst, which is applied in the field of photocatalytic material research, can solve the problems of weakened oxidation ability and reduction ability of semiconductor materials, reduced photocatalytic activity of visible light, and influence on photocatalytic activity of materials, and achieves excellent catalytic reduction CO2 performance and high practicality Value and application prospects, the effect of expanding the range of light absorption

Active Publication Date: 2018-04-03
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Zn 2 S 4 As a visible light catalyst, although it has good application prospects, its specific surface area is small, and photogenerated electrons are easy to recombine, so its visible light photocatalytic activity is greatly reduced, and its practical application is limited.
ZnIn 2 S 4 with one-dimensional TiO 2 Semiconductor recombination to form a heterojunction structure can effectively solve this problem, but the traditional suppression heterojunction structure often weakens the oxidation ability and reduction ability of semiconductor materials, which greatly affects the photocatalytic activity of the material.

Method used

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  • High-active ZnIn2S4/TiO2 Z system catalyst material and preparation method thereof
  • High-active ZnIn2S4/TiO2 Z system catalyst material and preparation method thereof
  • High-active ZnIn2S4/TiO2 Z system catalyst material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 0.043g zinc chloride (ZnCl 2 ), 0.018g indium chloride (InCl 3 ) and 0.1g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol and kept stirring at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Nanoribbon powder was added to the above solution, ultrasonically dispersed for 0.5 hours, and then stirred for 1 hour; then the formed solution was transferred to a 100mL polytetrafluoroethylene-lined autoclave, and solvothermal at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanobelt composite photocatalyst, labeled ZIS-0.25 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.25:1).

Embodiment 2

[0021] Weigh 0.057g zinc chloride (ZnCl 2 ), 0.024g indium chloride (InCl 3 ) and 0.14g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol, and stirred continuously at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Add nanoribbon powder to the above solution, ultrasonically disperse for 0.5 hours, and then stir for 1 hour; then transfer the formed solution to a 25ml polytetrafluoroethylene-lined autoclave, and heat it at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanobelt composite photocatalyst, labeled ZIS-0.33 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.33:1).

Embodiment 3

[0023] Weigh 0.086g zinc chloride (ZnCl 2 ), 0.036g indium chloride (InCl3 ) and 0.2g of thioacetamide (TAA) were ultrasonically dissolved in 80mL of ethylene glycol, and stirred continuously at room temperature for 0.5 hours; then weighed 0.1g of TiO 2 Add nanoribbon powder to the above solution, ultrasonically disperse for 0.5 hours, and then stir for 1 hour; then transfer the formed solution to a 25ml polytetrafluoroethylene-lined autoclave, and heat it at 120°C for 2 hours; After the product was centrifuged, washed and separated, it was dried in an oven for 8 hours to obtain the corresponding ZnIn 2 S 4 loaded TiO 2 Nanoribbon composite photocatalyst, labeled ZIS-0.50 / TO(ZnIn 2 S 4 / TiO 2 mol ratio 0.50:1).

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Abstract

The invention relates to a new preparation method of a ZnIn2S4 / TiO2Z system composite photocatalyst. The new preparation method comprises the following steps: (1) taking commercial P25 and sodium hydroxide solution as raw materials, performing hydrothermal treatment at 180DEG C for 48h, and performing replacement with H+ to obtain a H2Ti3O7 nanobelt, performing hydrothermal treatment through dilute sulfuric acid at 100DEG C, and performing high temperature calcination at 600DCG C to obtain a TiO2 nanobelt with rough surface; and (2) weighing zinc chloride, indium chloride, and thioacetamide according to a 1:2:4 molar ratio of Zn, In and S, and dissolving the zinc chloride, indium chloride, and thioacetamide into ethylene glycol to obtain a mixture, then dispersing the obtained TiO2 nanobelt into the mixture ultrasonically, performing treatment at 120DEG C for 2h, performing centrifugation and separation on the obtained mixture, and then performing oven-drying for 10h to obtain the ZnIn2S4 / TiO2Z system composite photocatalyst. According to the new preparation method, the obtained novel composite photocatalyst has an excellent performance on catalytic reduction of CO2 under a simulated sunlight condition; and the raw materials are inexpensive, and the technology is simple, so that the product cost is effectively reduced, a light absorption range is broadened, and utilization ratio of sunlight is improved, and the composite photocatalyst has a very high practical value and an application prospect.

Description

technical field [0001] The present invention relates to a kind of highly active ZnIn 2 S 4 / TiO 2 The invention relates to a Z system catalyst material and a preparation method thereof, belonging to the technical field of photocatalytic material research. Background technique [0002] Environmental pollution and energy shortage have always been major challenges faced by human beings. With the increase of human social activities and the massive consumption of fossil energy, the atmospheric CO 2 The increase in greenhouse gas emissions has led to global warming. Plant photosynthesis is the process by which green plants convert carbon dioxide and water into carbohydrates under the action of light. Artificial photosynthesis (that is, simulating photosynthesis in nature) is the use of photocatalysts to convert solar energy into hydrogen energy under light irradiation ( or hydrocarbon fuels) can also solve environmental problems at the same time. Therefore, photocatalysts ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01D53/86B01D53/62
CPCB01D53/62B01D53/86B01D2257/504B01J27/04B01J35/004Y02A50/20
Inventor 杨光陈代梅丁浩
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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